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Vabrog frumos ex 6 rapid
Dau coroana


Vabrog Frumos Ex 6 Rapid Dau Coroana class=

Răspuns :

C=md/ms*100 ⇒ md=C*ms/100=36,5*20/100=7,3g HCl

Zn + 2HCl  ⇒ ZnCl₂ + H₂↑

MHCl=AH+ACl=1+35,5=36,5g/mol

2*36,5g HCl.............................2 mol H₂
7,3g HCl..................................0,2 moli H₂

mH₂=0,2*2=0,4g H₂